The goal of this bachelor thesis is a summary of findings about an influence of production, production quality and health of high yeldsdairy cows. The work is systematically divided into four blocks. The first one talks about gastrointestinal system of ruminants following by mechanism and physiology of digestion. The cows are grazing, ruminate animals. The rumination makes the cattles unique among of others animals. Because of the fermentation process in the cows stomach it is possible for a cow to change a low quality of nutrition in the provender for high nutrition food like milk and meat. The dairycows gastrointestinal tract can be easily injured by incorrect functions, this can cost big production and health risk. Next part is focused...